2018-12-24 05:04:54 +09:00
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# Pleroma: A lightweight social networking server
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2020-03-04 07:44:49 +09:00
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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2018-12-24 05:04:54 +09:00
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# SPDX-License-Identifier: AGPL-3.0-only
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2017-11-23 03:06:07 +09:00
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defmodule Pleroma.Web.MediaProxy.MediaProxyController do
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use Pleroma.Web, :controller
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2020-04-21 22:29:19 +09:00
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2020-05-09 05:06:47 +09:00
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alias Pleroma.Config
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alias Pleroma.Helpers.MediaHelper
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alias Pleroma.ReverseProxy
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alias Pleroma.Web.MediaProxy
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2020-05-12 05:21:53 +09:00
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def remote(conn, %{"sig" => sig64, "url" => url64}) do
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with {_, true} <- {:enabled, MediaProxy.enabled?()},
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2018-11-24 01:40:45 +09:00
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{:ok, url} <- MediaProxy.decode_url(sig64, url64),
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{_, false} <- {:in_banned_urls, MediaProxy.in_banned_urls(url)},
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:ok <- MediaProxy.verify_request_path_and_url(conn, url) do
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ReverseProxy.call(conn, url, media_proxy_opts())
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else
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{:enabled, false} ->
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send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
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2018-03-30 22:01:53 +09:00
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2020-07-02 22:36:54 +09:00
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{:in_banned_urls, true} ->
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send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
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{:error, :invalid_signature} ->
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send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
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2018-11-24 01:40:45 +09:00
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{:wrong_filename, filename} ->
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redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
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end
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end
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2020-05-12 05:21:53 +09:00
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def preview(conn, %{"sig" => sig64, "url" => url64}) do
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with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
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{:ok, url} <- MediaProxy.decode_url(sig64, url64) do
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handle_preview(conn, url)
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else
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{:enabled, false} ->
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send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
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{:error, :invalid_signature} ->
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send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
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{:wrong_filename, filename} ->
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redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
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end
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end
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defp handle_preview(conn, url) do
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media_proxy_url = MediaProxy.url(url)
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with {:ok, %{status: status} = head_response} when status in 200..299 <-
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Pleroma.HTTP.request("head", media_proxy_url, [], [], pool: :media) do
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content_type = Tesla.get_header(head_response, "content-type")
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handle_preview(content_type, conn, media_proxy_url)
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2018-12-10 15:39:57 +09:00
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else
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{_, %{status: status}} ->
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send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
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{:error, :recv_response_timeout} ->
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send_resp(conn, :failed_dependency, "HEAD request timeout.")
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_ ->
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send_resp(conn, :failed_dependency, "Can't fetch HTTP headers.")
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end
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end
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2020-09-04 02:13:29 +09:00
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defp handle_preview(
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"image/" <> _ = _content_type,
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%{params: %{"output_format" => "jpeg"}} = conn,
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media_proxy_url
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) do
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handle_jpeg_preview(conn, media_proxy_url)
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end
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defp handle_preview("image/gif" = _content_type, conn, media_proxy_url) do
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redirect(conn, external: media_proxy_url)
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end
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defp handle_preview("image/png" <> _ = _content_type, conn, media_proxy_url) do
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handle_png_preview(conn, media_proxy_url)
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end
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defp handle_preview("image/" <> _ = _content_type, conn, media_proxy_url) do
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handle_jpeg_preview(conn, media_proxy_url)
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end
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2020-05-15 02:18:31 +09:00
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2020-09-05 22:16:35 +09:00
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defp handle_preview("video/" <> _ = _content_type, conn, media_proxy_url) do
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handle_video_preview(conn, media_proxy_url)
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end
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defp handle_preview(content_type, conn, _media_proxy_url) do
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send_resp(conn, :unprocessable_entity, "Unsupported content type: #{content_type}.")
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end
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defp handle_png_preview(%{params: params} = conn, media_proxy_url) do
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quality = Config.get!([:media_preview_proxy, :image_quality])
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with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
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{:ok, thumbnail_binary} <-
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MediaHelper.image_resize(
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media_proxy_url,
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%{
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max_width: thumbnail_max_width,
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max_height: thumbnail_max_height,
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quality: quality,
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format: "png"
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}
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) do
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conn
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|> put_preview_response_headers(["image/png", "preview.png"])
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|> send_resp(200, thumbnail_binary)
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else
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_ ->
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send_resp(conn, :failed_dependency, "Can't handle preview.")
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end
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end
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defp handle_jpeg_preview(%{params: params} = conn, media_proxy_url) do
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quality = Config.get!([:media_preview_proxy, :image_quality])
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2020-08-21 14:59:08 +09:00
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2020-05-21 02:26:43 +09:00
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with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(params),
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{:ok, thumbnail_binary} <-
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MediaHelper.image_resize(
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media_proxy_url,
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%{max_width: thumbnail_max_width, max_height: thumbnail_max_height, quality: quality}
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) do
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conn
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|> put_preview_response_headers()
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|> send_resp(200, thumbnail_binary)
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else
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_ ->
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send_resp(conn, :failed_dependency, "Can't handle preview.")
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end
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end
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defp handle_video_preview(conn, media_proxy_url) do
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with {:ok, thumbnail_binary} <-
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MediaHelper.video_framegrab(media_proxy_url) do
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conn
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|> put_preview_response_headers()
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|> send_resp(200, thumbnail_binary)
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else
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_ ->
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send_resp(conn, :failed_dependency, "Can't handle preview.")
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end
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end
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2020-09-05 22:16:35 +09:00
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defp put_preview_response_headers(
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conn,
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[content_type, filename] = _content_info \\ ["image/jpeg", "preview.jpg"]
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) do
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conn
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|> put_resp_header("content-type", content_type)
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|> put_resp_header("content-disposition", "inline; filename=\"#{filename}\"")
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|> put_resp_header("cache-control", ReverseProxy.default_cache_control_header())
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end
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2020-08-19 00:23:27 +09:00
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defp thumbnail_max_dimensions(params) do
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config = Config.get([:media_preview_proxy], [])
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thumbnail_max_width =
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if w = params["thumbnail_max_width"] do
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String.to_integer(w)
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else
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Keyword.fetch!(config, :thumbnail_max_width)
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end
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thumbnail_max_height =
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if h = params["thumbnail_max_height"] do
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String.to_integer(h)
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else
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Keyword.fetch!(config, :thumbnail_max_height)
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end
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{thumbnail_max_width, thumbnail_max_height}
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end
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2020-08-20 03:36:26 +09:00
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defp media_proxy_opts do
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Config.get([:media_proxy, :proxy_opts], [])
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end
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2017-11-23 03:06:07 +09:00
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end
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